void CMainFrame::OnGraphCircle()
{
// TODO: Add your command handler code here
m_Graph=ID_GRAPH_CIRCLE;
CPen *oPen,nPen;
nPen.CreatePen(PS_SOLID,m_Thickness,m_Color);
CClientDC cdc(this);
CRect rect;
GetClientRect(&rect);
cdc.FillRect(&rect,CBrush::FromHandle((HBRUSH)GetStockObject(LTGRAY_BRUSH)));
oPen=cdc.SelectObject(&nPen);
cdc.Ellipse(100,100,200,200);
cdc.SelectObject(&oPen);
}
这段代码中
GetClientRect(&rect);是什么意思啊 ? 起什么作用~ 我查了好半天书也不找到
谢谢了